Question

help pleas fan and medal if you want!
The graphs below show four functions:

Graph A shows function f of x equals 3 multiplied by 3 to the power of x. Graph B shows function f of x equals 9 to the power of x. Graph C shows function f of x equals 3 multiplied by 3 to the power of negative x. Graph D shows function f of x equals 9 to the power of negative x.

Which graph best shows the function f(x) = 3(3)-x to represent the rate at which a radioactive substance decays?

Answer 1

Graph A
Graph B
Graph C
Graph D